Peter claus and eugen gen gen bach



(No Model.)

B. GLAUS & E. GBNGENBAGH. BRUSH HOLDER FOR DYNAMOS- Patented Jan. 7

wblmwoeo W 5m Q UNITED STATES PATENT- ()FFICE.

PETER GLAUS AND EUGEN GENGENBAOH, OF NEW YORK, N. Y.

BRUSH-HOLDER FOR DYNAMOS.

SPECIFICATION forming part of Letters Patent No. 418,685, dated January7, 1890.

7 Application filed May 11, 1839. Serial No. 310,365. (No model.)

To all whom it may concern.-

Be it known that we, PETER OLAUs and EUGEN GENGENBAOH, subjects of HisMajesty the Emperor of Germany, and residents of the city, county, andState of New York, have made a new and useful Improvement in BrushHolders for Dynamo and Magneto Electric Machines and Motors, of which wedeclare the following to be a full, clear, and exact description,reference being had to the accompanying drawings, forming part of thisspecification.

The object of our invention is to provide a brush -holder which shallkeep the brush against the commutator with an even but yieldingpressure, which will allow the brush to adjust itself to anyinequalities on the periphery of the commutator, and which pressure canbe readily increased or diminished to any desired extent, and at thesame time to maintain a perfect electrical connection between thedifferent parts of the device; and to this end our invention consists inthe novel details of construction and arrangement and combination ofparts, hereinafter more fully set forth.

In the drawings, Figure 1 is a sectional elevation of our improvedbrush-holder on the line 1 1, Fig. 2. Fig. 2 is an end elevationthereof, and Fig. 3 is a detail sectional view on the line 3 3, Fig. 1.

Similar letters of reference are used to designate corresponding partsin all the figures.

The bolt or stud A, which supports the brush-holder, is suitablyinsulated from the frame of the machine, and is mounted over or adjacentto the commutator in the usual way. An arm B of conducting material isrotatably hung upon the bolt A. The lower portion of this arm isbifurcated, and its upper or solid end is provided with a mortise Z), inwhich the brush 0 is securely held by the clamp D and set-screw E.

Upon the bolt A, between the two lower ends of the arm B, is'hu'ng thesleeve F, which is provided with a keyf, running the entire length ofthe sleeve? The key f is adjustable within the sleeve and is adapted tobe pressed tightly against the bolt A by the set-screwf', whereby thesleeve will be prevented from turning or being moved on the bolt A.WVhen the pressure of the set-screw is relieved, however, the sleeve Fcan be turned freely on said bolt, and the sleeve F and arm B can alsobe moved lengthwise thereon to any desired point opposite thecommutator. The sleeve F is provided with a spur orprojection f whichextends under the arm B. One end of a spiral spring G is attached to theouter end of this projection, and the other end of the spring is securedto the upper portion of the arm B. One or more flexible conductingcablesH, formed by preference, but not essentially, of fine copper wiresbraided, as shown, are connected at one end to the upper portion of thearm B and at the other end to the projection) on the sleeve F, thusmaintaining a flexible yet thoroughlyefficient electrical connectionbetween the brush 0 and the sleeve F.

The operation of our invention is as follows: The arm B and sleeve Fhaving been properly mounted upon the bolt A, the brush 0 is secured inthe mortise b in the upper end of the arm. They are then moved along thebolt A until the brush is opposite the desired point of contact with thecommutator. The sleeve F is then turned so as to carry the. outer end ofthe spur away from the brush 0, and the resultant tension of the springG will tend to draw the upper end of the arm B toward the commutator andbring the end of the brush 0 firmly against the periphery thereof. Thefarther the sleeve F is turned the greater will be the pressure of thebrush against the commutator, and when the desired pressure is thusattained the set-screw f is turned and the key f is forced tightlyagainst the bolt A, clamping the sleeve firmly in position. It will nowbe understood that the brush is held firmly against the periphery of thecommutator with a steady pressure, and automatically adjusts itself toany unevenness on the surface of the latter.

The brush may be lifted entirely clear of the commutator withoutchanging 01' disturbing the adjustment of the sleeve F. The tension ofthe spring which holds the brush against the commutator is readilyadjustable, and the large bearing-surface of the clamping-key f againstthe supporting-bolts aifords a large contact-surface, and at the sametime prevents the excoriation of the supportingbolt, which occurs whereordinary binding or too set screws are used for holding the brush inposition. The flexible connection of the brushes to the sleeve, by meansof the independent conduotors H, renders it possible to attain all theseadvantages, and at the same time to preserve a perfect electricalcontact between the brush and the supporting-bolt, from which thecurrent is taken to the main connections.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. The combination, with a support boltor stud, of a sleeve carriedthereby, a swinging brush-supporting arm, also carried by said bolt orstud, a spring connecting said arm with said sleeve, and a flexibleelectric connection between said arm and said sleeve, substantially asand for the purposes set forth.

2, The combination, with a supporting bolt or stud, of an adjustablesleeve carried there by, a clamping device for securing said sleeve tosaid bolt or stud, a swinging brush-holding arm carried by said bolt orstud, a spring connecting said arm with said sleeve, and a flexibleelectric connection between said arm and said sleeve, substantially asand for the purposes set forth.

3. The combination, with a supporting-bolt A, of the brush-carrying armB, the adj ustable sleeve F, provided with a key f and setscrewf, aspring G, and electric conductors Il, substantially as shown anddescribed.

PETER GLAUS. EUGEN GENGEN EACH.

\Vitnesses:

THEoE RUBY, CHAS. A. MURPHEY.

